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Crumar DS 2

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    Crumar DS 2

    Hi everyone,

    I'm trying to revive my Crumar DS 2. One of the first digital synthesizers.

    Due to the construction of this machine some cables inside the case have been broken or simply disconnected during the last 35 years.

    The DCO's won't trigger. Now the question is how to correctly connect the cables to the keyboad-pcb

    I'm hoping to find a picture of the keyboard-contacts-pcb from wich I can retrieve the right connection of the cables to it. The Poly-section works, the connections at the right side of the pcb seem to be correct. Now how are the 2 cables at the left side to be connected?

    #2
    There is a scheme + manual around somewhere, i did put ot on the net in the past
    Might help
    Also at msc beegden ( music service centre) they have experience with the ds2, always let them service mine in the past.
    Bijgevoegde bestanden
    Laatst gewijzigd door sunny pedaal , 17 april 2017, 12:27.
    "FILTER MAINTENANCE- After every 100 hours of operation apply a sine wave to the output of the FILTER to back flush the trapped overtones to unclog your filter." - (EML 101 Manual)

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      #3
      Originally posted by richahe View Post
      Hi everyone,

      I'm trying to revive my Crumar DS 2. One of the first digital synthesizers.
      Well its pretty much an analog synthesizer (using DCO's) they just liked to coin the digital term so it would found futuristic

      Comment


        #4
        Papers included in post above
        Be carefull with soldering, use special tin as quality inside ds2 isn't that great ( when soldering normal temp tin tends to "spat/explode, use lower temp types)
        "FILTER MAINTENANCE- After every 100 hours of operation apply a sine wave to the output of the FILTER to back flush the trapped overtones to unclog your filter." - (EML 101 Manual)

        Comment


          #5
          Yessss, mijn Crumar DS 2 lijkt te ontwaken. Alles doet het weer. Behalve 1 probleempje. Als ik een toets in druk blijft hij , na het los laten, de toon van de eerste toets genereren. Dat is dus niet het poly-gedeelte maar de vco's. Ergens blijft er dus nog een pulsje hangen. Iemand nog suggesties? Haha, had nooit gedacht dat ik me nog eens met de Italiaanse taal zou bezig houden. Maar ik ben er bijna met die bak. HELP

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            #6
            Heb je de portamento switches uit staan ( re van het toetsenbord )?
            ( is het portamentostuk in orde )
            Laatst gewijzigd door sunny pedaal , 13 mei 2018, 09:23.
            "FILTER MAINTENANCE- After every 100 hours of operation apply a sine wave to the output of the FILTER to back flush the trapped overtones to unclog your filter." - (EML 101 Manual)

            Comment

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